# tune2fs > Adjust parameters of an ext2, ext3 or ext4 filesystem. > May be used on mounted filesystems. > More information: . - Set the max number of counts before a filesystem is checked to 2: `tune2fs -c {{2}} {{/dev/sdXN}}` - Set the filesystem label to MY_LABEL: `tune2fs -L {{'MY_LABEL'}} {{/dev/sdXN}}` - Enable discard and user-specified extended attributes for a filesystem: `tune2fs -o {{discard,user_xattr}} {{/dev/sdXN}}` - Enable journaling for a filesystem: `tune2fs -o^{{nobarrier}} {{/dev/sdXN}}`